diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 150143e..6442d87 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -35,7 +35,7 @@ jobs:
           python-version: '3.10'
       - run: pip install Sphinx
       - run: make doctest
-      - uses: peaceiris/actions-gh-pages@v3.9.3
+      - uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: doc/_build/html